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Ultra-thin electron radiation crosslinked polyolefin foamed sheet and preparation method thereof

A cross-linked polyolefin and electron radiation technology, which is applied in the field of ultra-thin electron radiation cross-linked polyolefin foam sheet and its preparation, can solve the problem that the production process cannot produce ultra-thin sheets, and has not yet been sold or developed. The degree of foaming is difficult to control, etc.

Active Publication Date: 2012-10-24
HUBEI XIANGYUAN NEW MATERIAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is an urgent need in the market for an ultra-thin electronic radiation cross-linked polyolefin foam sheet with a thickness of only 0.1-0.3 mm, but the traditional formula and production process cannot produce this ultra-thin sheet, so there is no such thing as yet. There are sales of this model
The technical difficulty in the development of this type of electron radiation cross-linked polyolefin foam sheet is: since this type of product is a chemical foam, it is difficult to control the degree of foaming during the foaming process. Currently, the thinnest thickness that can be controlled is 0.5mm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] An ultra-thin (0.1-0.3 mm) electron radiation crosslinked polyolefin foam sheet and a preparation method thereof, comprising the following steps:

[0015] Step 1: Preparation of graft base material: Take 5-20KgLLDPE, 2-10Kg EPDM, 30-60KgEVA, 1-2Kg A171, 0.1-0.3KgDCP, 1-2Kg PE wax, 0.3-0.5Kg1010# into the banburying Fully banburying in the machine for 8-10 minutes, the banburying temperature is 70-100°C, in which A171 is added in the last minute, and then discharged into the two-stage mixing and granulating machine for mixing, grafting, and granulation. The working temperature of the cascade mixing and granulating machine is: 135±5℃ in the first zone, 145±5℃ in the second zone, 165±5℃ in the third zone, 175±5℃ in the fourth zone, 185±5℃ in the fifth zone, 170 in the sixth zone ±5°C.

[0016] The second step: Extrusion of the sheet: Take 80-10Kg of graft base material, 2-3Kg of AC foaming agent, 1-2Kg of TMPTMA, 1-2Kg of zinc stearate, and 3-5Kg of talcum powder into the...

Embodiment 1

[0020] Example 1: An ultra-thin (0.1-0.3 mm) electron radiation crosslinked polyolefin foam sheet and its preparation method,

[0021] The preparation method comprises the following steps in turn:

[0022] An ultra-thin (0.1-0.3 mm) electron radiation crosslinked polyolefin foam sheet and a preparation method thereof, comprising the following steps:

[0023] Step 1: Preparation of graft base material: Take 5KgLLDPE, 2Kg EPDM, 30KgEVA, 1Kg A171, 0.1KgDCP, 1Kg PE wax, 0.3Kg1010# into the internal mixer, fully banbury for 8-10 minutes, the banbury temperature 70-100℃, in which A171 is added at the last minute, and then discharged into the two-stage mixing and granulating machine for mixing, grafting, and granulating. The working temperature of the two-stage mixing and granulating machine is: 1 Zone 135±5℃, zone 2 145±5℃, zone 3 165±5℃, zone 4 175±5℃, zone 5 185±5℃, zone 6 170±5℃.

[0024] The second step: Extrusion of the sheet: take 80Kg of graft base material, 2Kg of AC foami...

Embodiment 2

[0044] With embodiment 1, difference is: the first step: get 20KgLLDPE, 10Kg EPDM, 60KgEVA, 2Kg A171, 0.3KgDCP, 2Kg PE wax, 0.5Kg1010#; Second step: get 10Kg graft base material, 3KgAC foaming agent, 2KgTMPTMA, 2Kg zinc stearate, 5Kg talcum powder.

[0045] Main performance data: product thickness, 0.3mm; service temperature -50-150°C; tensile strength ≥ 3Mpa; elongation at break ≥ 350%; compression set ≤ 1%; average cell diameter ≤ 20μm.

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Abstract

The invention relates to an ultra-thin electron radiation crosslinked polyolefin foamed sheet and a preparation method thereof. The preparation method comprises the following steps: step 1: adding LLDPE (Linear Low Density Polyethylene), EPDM (Ethylene-Propylene-Diene Monomer), EVA (Ethylene Vinyl Acetate), A171, DCP (Dibasic Calcium Phosphate), PE (Polyethylene) wax and an antioxidant 1010 to an internal mixer for fully internal mixing for 8-10 minutes at the internal mixing temperature of 70-100 DEG C, and then discharging the mixture into a double-stepped mixing granulator for mixing, grafting and granulation to obtain a grafting base material; step 2: adding the grafting base material, an AC foaming agent, a crosslinking agent, zinc stearate and talcum powder into a high-speed mixer for mixing, and then discharging the mixture into a single screw extruder to be extruded into a sheet; step 3: adding the extruded sheet in the step 2 to an electronic accelerator for radiation crosslinking; step 4: adding the sheet subjected to radiation crosslinking to a foaming furnace for foaming; and step 5: directly adding the formed sheet to a double-roll calender for calendering to obtain the electron radiation crosslinked polyolefin foamed sheet with the thickness of 0.1-0.3mm.

Description

technical field [0001] The invention relates to an ultra-thin electron radiation crosslinked polyolefin foam sheet and a preparation method. Background technique [0002] Electron radiation cross-linked polyolefin foam sheet, that is, IXPE (Irradiation crpsslinked polyethylene foam) foam material, is a polyolefin polymer and various additives blended and extruded, cross-linked by electron accelerator radiation, high temperature foaming Polymer foam material made by technology. The main features of the product are: thin thickness, light weight, smooth and delicate surface, uniform and closed cells, excellent heat and sound insulation performance, light weight, moisture-proof, environmental protection, good physical properties, and easy secondary processing. The main application scope is: a. In the field of packaging, the product of the invention has excellent cushioning performance, shockproof and shatterproof, and is often used for packaging precision instruments and optica...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08F255/02C08F255/06C08K13/02C08K5/103C08K5/098C08K3/34C08J9/10B29C47/00B29C59/04B29C71/04B29C44/00
Inventor 魏琼段贤安
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC
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